I find that after emptying and refilling the system, I'll "lose" coolant every time I drive. That's not what's happening, but that's what it seems like.mmac78 wrote:Thanks for the replies. Okay I've found it lost some coolant after a little drive today so topped up again maybe I shouldn't have topped it up at all.
What's actually happening is the air trapped in the system bleeds out via the expansion bottle when hot, and then as it cools down it sucks the expansion bottle dry, making me think I've lost coolant somewhere.
All substances (including water) expand when hot. If you have a coolant system that doesn't use it's expansion bottle, then more than likely there's an air bubble in it somewhere or it's simply not full, and the coolant is expanding into the air bubble (because liquids don't compress easily/at all, whereas air compresses very easily).zook123 wrote:I still can't understand this system, I'm used to an expansion bottle which never moves, yet the Jimny is up and down like a whore's knickers!